1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "ARM System Control and Management Interface Protocol"
4 config ARM_SCMI_PROTOCOL
5 tristate "ARM System Control and Management Interface (SCMI) Message Protocol"
6 depends on ARM || ARM64 || COMPILE_TEST
8 ARM System Control and Management Interface (SCMI) protocol is a
9 set of operating system-independent software interfaces that are
10 used in system management. SCMI is extensible and currently provides
11 interfaces for: Discovery and self-description of the interfaces
12 it supports, Power domain management which is the ability to place
13 a given device or domain into the various power-saving states that
14 it supports, Performance management which is the ability to control
15 the performance of a domain that is composed of compute engines
16 such as application processors and other accelerators, Clock
17 management which is the ability to set and inquire rates on platform
18 managed clocks and Sensor management which is the ability to read
19 sensor data, and be notified of sensor value.
21 This protocol library provides interface for all the client drivers
22 making use of the features offered by the SCMI.
26 config ARM_SCMI_HAVE_TRANSPORT
29 This declares whether at least one SCMI transport has been configured.
30 Used to trigger a build bug when trying to build SCMI without any
33 config ARM_SCMI_HAVE_SHMEM
36 This declares whether a shared memory based transport for SCMI is
39 config ARM_SCMI_HAVE_MSG
42 This declares whether a message passing based transport for SCMI is
45 config ARM_SCMI_TRANSPORT_MAILBOX
46 bool "SCMI transport based on Mailbox"
48 select ARM_SCMI_HAVE_TRANSPORT
49 select ARM_SCMI_HAVE_SHMEM
52 Enable mailbox based transport for SCMI.
54 If you want the ARM SCMI PROTOCOL stack to include support for a
55 transport based on mailboxes, answer Y.
57 config ARM_SCMI_TRANSPORT_SMC
58 bool "SCMI transport based on SMC"
59 depends on HAVE_ARM_SMCCC_DISCOVERY
60 select ARM_SCMI_HAVE_TRANSPORT
61 select ARM_SCMI_HAVE_SHMEM
64 Enable SMC based transport for SCMI.
66 If you want the ARM SCMI PROTOCOL stack to include support for a
67 transport based on SMC, answer Y.
69 config ARM_SCMI_TRANSPORT_VIRTIO
70 bool "SCMI transport based on VirtIO"
72 select ARM_SCMI_HAVE_TRANSPORT
73 select ARM_SCMI_HAVE_MSG
75 This enables the virtio based transport for SCMI.
77 If you want the ARM SCMI PROTOCOL stack to include support for a
78 transport based on VirtIO, answer Y.
80 endif #ARM_SCMI_PROTOCOL
82 config ARM_SCMI_POWER_DOMAIN
83 tristate "SCMI power domain driver"
84 depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
86 select PM_GENERIC_DOMAINS if PM
88 This enables support for the SCMI power domains which can be
89 enabled or disabled via the SCP firmware
91 This driver can also be built as a module. If so, the module
92 will be called scmi_pm_domain. Note this may needed early in boot
93 before rootfs may be available.